--- a/common/autoconf/jdk-options.m4	Wed Sep 18 12:37:54 2013 +0200
+++ b/common/autoconf/jdk-options.m4	Wed Sep 18 13:49:49 2013 +0200
@@ -446,7 +446,7 @@
 else
   BUILD_DATE=`date '+%Y_%m_%d_%H_%M'`
   # Avoid [:alnum:] since it depends on the locale.
-  CLEAN_USERNAME=`echo "$USER" | $TR -d -c 'abcdefghijklmnopqrstuvqxyz0123456789'`
+  CLEAN_USERNAME=`echo "$USER" | $TR -d -c 'abcdefghijklmnopqrstuvqxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'`
   USER_RELEASE_SUFFIX=`echo "${CLEAN_USERNAME}_${BUILD_DATE}" | $TR 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz'`
 fi
 AC_SUBST(USER_RELEASE_SUFFIX)